Add warning about current year in impact factor display

stats/templates/stats/statistics.html

@@ -43,7 +43,7 @@
 {% if journal %}
     <h2>Results:</h2>
     {% if year %}
-    <h3>Impact factor (Cited-by) for {{ year }}: {{ citedby_impact_factor|floatformat:2 }}</h3>
+    <h3>Impact factor (Cited-by) for {{ year }}: {{ citedby_impact_factor|floatformat:2 }} {% now "Y" as currentyear %}{% if year is currentyear %}<span style="color: red;">WARNING: not complete (year is current one)</span>{% endif %}</h3>
       {% endif %}
     <table class="table">
       <tr>